Ha! Yes, know what you mean, especially about learning new programming for the STMs. Look forward to seeing the PGA2311 and MPD projects.

In the top left of the second image down, is that orange board one of the eBay $6.65 BB 5102A DAC boards? If so, what’s your opinion of it? I have been looking at them as an alternative to the $30 DIYINHK equivalent.

Great minds…and all that. I, too, ordered the 5102A and a 9023 to compare. Haven’t received them yet. Maybe I’ll beat you to that point on the to-do list. Meanwhile, get back to work…we’re waiting on those write-ups 😜

The INVR & INVL registers are pretty much what you’d expect them to be. They invert the signals of the right and left channels respectively. I make use of them in my build because my discreet output stage is inverting. This way the DAC as a whole is non inverting.

Does the PGA2311 preamp project include IR remote control? Been looking for a non-pot remote controlled volume control for a Peter Daniel gainclone. Seeing as how you’re nearly done it’d be ideal….;-))